Opened 22 months ago

#1439 new defect

IRAP constraint for Main 4:4:4 Intra profile

Reported by: o.nakagami Owned by:
Priority: minor Milestone:
Component: Text Version:
Keywords: Cc: bbross, wjhan, jct-vc@…

Description

The spec says (e.g. JVCTV-V1005-v1), in A.3.5,

– In bitstreams conforming to the Main Intra, Main 10 Intra, Main 12 Intra, Main 4:2:2 10 Intra, Main 4:2:2 12 Intra, Main 4:4:4 10 Intra, Main 4:4:4 12 Intra, or Main 4:4:4 16 Intra profiles, all pictures with nuh_layer_id equal to 0 shall be IRAP pictures and the output order indicated in the bitstream among these pictures shall be the same as the decoding order.

However, "Main 4:4:4 Intra" is not listed.

I think this is a typo of the spec text and should be fixed as below.

– In bitstreams conforming to the Main Intra, Main 10 Intra, Main 12 Intra, Main 4:2:2 10 Intra, Main 4:2:2 12 Intra, Main 4:4:4 Intra, Main 4:4:4 10 Intra, Main 4:4:4 12 Intra, or Main 4:4:4 16 Intra profiles, all pictures with nuh_layer_id equal to 0 shall be IRAP pictures and the output order indicated in the bitstream among these pictures shall be the same as the decoding order.

As a background, the issue is found on checking GENERAL_8b_444_RExt_Sony_1 which (not intentionally) includes TRAIL NAL in the Intra profile bitstream.
If the text fix is agreed, the bitstream will also be revised.

Change History (0)

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These roles will be notified: Reporter, Owner, Subscriber, Participant

  • Benjamin Bross(Subscriber)
  • David Flynn(Always)
  • jct-vc@…(Subscriber)
  • Karl Sharman(Always)
  • Karsten Suehring(Always)
  • Ohji Nakagami(Reporter)
  • Woo-Jin Han(Subscriber)